0000000000822690
AUTHOR
Cristina Martins
ESPRESSO highlights the binary nature of the ultra-metal-poor giant HE 0107-5240
Context. The vast majority of the known stars of ultra low metallicity ([Fe=H] >-4:5) are known to be enhanced in carbon, and belong to the 'low-carbon band' (A(C) = log(C=H) + 12 7:6). It is generally, although not universally, accepted that this peculiar chemical composition reflects the chemical composition of the gas cloud out of which these stars were formed. The first ultra-metalpoor star discovered, HE 0107-5240, is also enhanced in carbon and belongs to the 'low-carbon band'. It has recently been claimed to be a long-period binary, based on radial velocity measurements. It has also been claimed that this binarity may explain its peculiar composition as being due to mass transfer fro…
Effect of implantation technique on outcomes in patients receiving bioresorbable scaffolds in various clinical scenarios
ABSTRACT Introduction and objectives: The PSP (pre-dilation, sizing and post-dilation) score, derived from the GHOST-EU registry, has evaluated the relationship between the implantation technique of bioresorbable scaffolds and the clinical outcomes. The objective was to perform an external validation of the PSP technique and to determine its effect on adverse cardiac events in various clinical and anatomical scenarios. Methods: Data from the REPARA registry (2230 patients) were used for external validation, whereas a common database combining REPARA and GHOST-EU (3250 patients) data was used to evaluate the effect of PSP technique in various clinical and anatomical scenarios. PSP-1 and PSP-…
Estudos sobre a aquisição/aprendizagem do género nominal por aprendentes de português língua não materna: valências pedagógicas
O género nominal (quer a atribuição do valor, quer a concordância) é uma estrutura reconhecidamente crítica para aprendentes do português como língua não materna (PLNM), havendo já vários estudos relativos à aquisição/aprendizagem do português que o comprovam (Ferreira, 2011 e 2019; Godinho, 2010; Leiria, 2006; Li & Flores, 2019; Mariotto & Lourenço-Gomes, 2013; Mariotto, 2014; Lacsán, 2015; Martins, 2015; Pinto, 2015 e Silva, 2018). Neste trabalho, estes estudos são analisados tendo em vista o aproveitamento pedagógico dos seus resultados e considerando o seu eventual contributo para a descrição do built-in syllabus (Corder, 1967) dos aprendentes de PLNM. Uma análise desta natureza…